184 
all similar, bearing the sori on the contracted: 
apex ; stipes adherent to the rhizome. 
(a) Barren frond entire. 
1. G, variabtls. 
(6) Barren fronds sometimes simple, but 
at least one or two pairs of distinct pinnze when. 
fully developed. 
(*) Barren fronds more or less oak-leaf- 
shaped consisting of a lobed termi- 
nal pinna and a pair of unequal 
/ sided lateral pinne. 
2. G. quercifolia. 
(72) Barren fronds simple, trifoliate or 
pinnate, the terminal pinnz being 
elongated and proliferous. 
3. G. flagellifera. 
(c) Barren fronds copiously pinnate. 
(:) Main veins conspicuous two-thirds of 
the way to the margin; meshes 
abutting on the costa without any 
included veinlets, others including 
several veinlets which are either 
free with elevate apices or join 
with the mesh above. 
4. G. contaminans. 
